Welding pass / fail judgment device and welding pass / fail judgment method

摘要

PPROBLEM TO BE SOLVED: To prevent breaking in a process line, by determining the quality of welding, including the welding width and accurately determining the quality of welding. PSOLUTION: The welding acceptance determining device 10 comprises a temperature state determining unit 1 for determining the acceptance of a welding portion during welding;a welded width determining unit 2 for determining the suitability of the welded width; and a determining unit 3 for determining the acceptance of the welded portion based results, determined by the temperature state determining unit 1 and the welded width determining unit 2, in which the temperature state determining unit 1 specifies the threshold temperature for acceptance determination from a steel type and a plate thickness of a precedent steel strip and a steel type and a plate thickness of a following steel strip, based on a welded portion temperature state acceptance determination table 20. The device determines the acceptance of a welded portion temperature state, based on this specified threshold temperature, and the welded width determining unit 2 specifies a threshold length for suitability determination from the plate thickness of the preceding steel strip and that of the following steel strip, based on a welded width suitability determination table 30 and determines the suitability of the welded width, based on this specified threshold length. PCOPYRIGHT: (C)2008,JPO&INPIT